Appeal No. 1997-0211
Application No. 08/252,288
function to produce a first integrated quantity wherein the sine function has a
frequency of a harmonic of the fundamental frequency, and for integrating,
beginning at the switching angle in the present cycle of the output AC power, a
product of the inverter signal and a cosine function to produce a second
integrated quantity wherein the cosine function has the frequency of the harmonic
of the fundamental frequency;
predicting means, responsive to the integrating means, for predicting
varied first and second integrated quantities in a subsequent cycle of the output
AC power if the switching angle is varied, and for predicting unvaried first and
second integrated quantities in the subsequent cycle of the output AC power if the
switching angle is unvaried; and,
means, connected to the inverting means and responsive to the predicting
means, for controlling the inverting means so as to vary the switching angle in the
subsequent cycle of the output AC power if the varied first and second integrated
quantities are each closer to a desired level than are the unvaried first and
second integrated quantities, and so as not to vary the switching angle in the
subsequent cycle of the output AC power if the unvaried first and second
integrated quantities are each closer to a desired level than are the varied first
and second integrated quantities.
The prior art references of record relied upon by the Examiner in rejecting the
appealed claims are:
Kislovski 5,045,771 Sep. 03, 1991
Maddali et al. (Maddali) 5,327,335 Jul. 05, 1994
(Filed Sep. 28, 1992)
Claims 1-14 stand rejected under 35 U.S.C. § 103 as being unpatentable over
Maddali in view of Kislovski.
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